diff options
Diffstat (limited to 'include/linux/fs.h')
| -rw-r--r-- | include/linux/fs.h | 174 |
1 files changed, 84 insertions, 90 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 006278d84d2f..2acc46fb5f97 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1296,22 +1296,22 @@ static inline void i_gid_write(struct inode *inode, gid_t gid) } /** - * i_uid_into_vfsuid - map an inode's i_uid down into a mnt_userns - * @mnt_userns: user namespace of the mount the inode was found from + * i_uid_into_vfsuid - map an inode's i_uid down according to an idmapping + * @idmap: idmap of the mount the inode was found from * @inode: inode to map * - * Return: whe inode's i_uid mapped down according to @mnt_userns. + * Return: whe inode's i_uid mapped down according to @idmap. * If the inode's i_uid has no mapping INVALID_VFSUID is returned. */ -static inline vfsuid_t i_uid_into_vfsuid(struct user_namespace *mnt_userns, +static inline vfsuid_t i_uid_into_vfsuid(struct mnt_idmap *idmap, const struct inode *inode) { - return make_vfsuid(mnt_userns, i_user_ns(inode), inode->i_uid); + return make_vfsuid(idmap, i_user_ns(inode), inode->i_uid); } /** * i_uid_needs_update - check whether inode's i_uid needs to be updated - * @mnt_userns: user namespace of the mount the inode was found from + * @idmap: idmap of the mount the inode was found from * @attr: the new attributes of @inode * @inode: the inode to update * @@ -1320,50 +1320,50 @@ static inline vfsuid_t i_uid_into_vfsuid(struct user_namespace *mnt_userns, * * Return: true if @inode's i_uid field needs to be updated, false if not. */ -static inline bool i_uid_needs_update(struct user_namespace *mnt_userns, +static inline bool i_uid_needs_update(struct mnt_idmap *idmap, const struct iattr *attr, const struct inode *inode) { return ((attr->ia_valid & ATTR_UID) && !vfsuid_eq(attr->ia_vfsuid, - i_uid_into_vfsuid(mnt_userns, inode))); + i_uid_into_vfsuid(idmap, inode))); } /** * i_uid_update - update @inode's i_uid field - * @mnt_userns: user namespace of the mount the inode was found from + * @idmap: idmap of the mount the inode was found from * @attr: the new attributes of @inode * @inode: the inode to update * * Safely update @inode's i_uid field translating the vfsuid of any idmapped * mount into the filesystem kuid. */ -static inline void i_uid_update(struct user_namespace *mnt_userns, +static inline void i_uid_update(struct mnt_idmap *idmap, const struct iattr *attr, struct inode *inode) { if (attr->ia_valid & ATTR_UID) - inode->i_uid = from_vfsuid(mnt_userns, i_user_ns(inode), + inode->i_uid = from_vfsuid(idmap, i_user_ns(inode), attr->ia_vfsuid); } /** - * i_gid_into_vfsgid - map an inode's i_gid down into a mnt_userns - * @mnt_userns: user namespace of the mount the inode was found from + * i_gid_into_vfsgid - map an inode's i_gid down according to an idmapping + * @idmap: idmap of the mount the inode was found from * @inode: inode to map * - * Return: the inode's i_gid mapped down according to @mnt_userns. + * Return: the inode's i_gid mapped down according to @idmap. * If the inode's i_gid has no mapping INVALID_VFSGID is returned. */ -static inline vfsgid_t i_gid_into_vfsgid(struct user_namespace *mnt_userns, +static inline vfsgid_t i_gid_into_vfsgid(struct mnt_idmap *idmap, const struct inode *inode) { - return make_vfsgid(mnt_userns, i_user_ns(inode), inode->i_gid); + return make_vfsgid(idmap, i_user_ns(inode), inode->i_gid); } /** * i_gid_needs_update - check whether inode's i_gid needs to be updated - * @mnt_userns: user namespace of the mount the inode was found from + * @idmap: idmap of the mount the inode was found from * @attr: the new attributes of @inode * @inode: the inode to update * @@ -1372,83 +1372,83 @@ static inline vfsgid_t i_gid_into_vfsgid(struct user_namespace *mnt_userns, * * Return: true if @inode's i_gid field needs to be updated, false if not. */ -static inline bool i_gid_needs_update(struct user_namespace *mnt_userns, +static inline bool i_gid_needs_update(struct mnt_idmap *idmap, const struct iattr *attr, const struct inode *inode) { return ((attr->ia_valid & ATTR_GID) && !vfsgid_eq(attr->ia_vfsgid, - i_gid_into_vfsgid(mnt_userns, inode))); + i_gid_into_vfsgid(idmap, inode))); } /** * i_gid_update - update @inode's i_gid field - * @mnt_userns: user namespace of the mount the inode was found from + * @idmap: idmap of the mount the inode was found from * @attr: the new attributes of @inode * @inode: the inode to update * * Safely update @inode's i_gid field translating the vfsgid of any idmapped * mount into the filesystem kgid. */ -static inline void i_gid_update(struct user_namespace *mnt_userns, +static inline void i_gid_update(struct mnt_idmap *idmap, const struct iattr *attr, struct inode *inode) { if (attr->ia_valid & ATTR_GID) - inode->i_gid = from_vfsgid(mnt_userns, i_user_ns(inode), + inode->i_gid = from_vfsgid(idmap, i_user_ns(inode), attr->ia_vfsgid); } /** * inode_fsuid_set - initialize inode's i_uid field with callers fsuid * @inode: inode to initialize - * @mnt_userns: user namespace of the mount the inode was found from + * @idmap: idmap of the mount the inode was found from * * Initialize the i_uid field of @inode. If the inode was found/created via - * an idmapped mount map the caller's fsuid according to @mnt_users. + * an idmapped mount map the caller's fsuid according to @idmap. */ static inline void inode_fsuid_set(struct inode *inode, - struct user_namespace *mnt_userns) + struct mnt_idmap *idmap) { - inode->i_uid = mapped_fsuid(mnt_userns, i_user_ns(inode)); + inode->i_uid = mapped_fsuid(idmap, i_user_ns(inode)); } /** * inode_fsgid_set - initialize inode's i_gid field with callers fsgid * @inode: inode to initialize - * @mnt_userns: user namespace of the mount the inode was found from + * @idmap: idmap of the mount the inode was found from * * Initialize the i_gid field of @inode. If the inode was found/created via - * an idmapped mount map the caller's fsgid according to @mnt_users. + * an idmapped mount map the caller's fsgid according to @idmap. */ static inline void inode_fsgid_set(struct inode *inode, - struct user_namespace *mnt_userns) + struct mnt_idmap *idmap) { - inode->i_gid = mapped_fsgid(mnt_userns, i_user_ns(inode)); + inode->i_gid = mapped_fsgid(idmap, i_user_ns(inode)); } /** * fsuidgid_has_mapping() - check whether caller's fsuid/fsgid is mapped * @sb: the superblock we want a mapping in - * @mnt_userns: user namespace of the relevant mount + * @idmap: idmap of the relevant mount * * Check whether the caller's fsuid and fsgid have a valid mapping in the * s_user_ns of the superblock @sb. If the caller is on an idmapped mount map - * the caller's fsuid and fsgid according to the @mnt_userns first. + * the caller's fsuid and fsgid according to the @idmap first. * * Return: true if fsuid and fsgid is mapped, false if not. */ static inline bool fsuidgid_has_mapping(struct super_block *sb, - struct user_namespace *mnt_userns) + struct mnt_idmap *idmap) { struct user_namespace *fs_userns = sb->s_user_ns; kuid_t kuid; kgid_t kgid; - kuid = mapped_fsuid(mnt_userns, fs_userns); + kuid = mapped_fsuid(idmap, fs_userns); if (!uid_valid(kuid)) return false; - kgid = mapped_fsgid(mnt_userns, fs_userns); + kgid = mapped_fsgid(idmap, fs_userns); if (!gid_valid(kgid)) return false; return kuid_has_mapping(fs_userns, kuid) && @@ -1602,42 +1602,42 @@ static inline bool sb_start_intwrite_trylock(struct super_block *sb) return __sb_start_write_trylock(sb, SB_FREEZE_FS); } -bool inode_owner_or_capable(struct user_namespace *mnt_userns, +bool inode_owner_or_capable(struct mnt_idmap *idmap, const struct inode *inode); /* * VFS helper functions.. */ -int vfs_create(struct user_namespace *, struct inode *, +int vfs_create(struct mnt_idmap *, struct inode *, struct dentry *, umode_t, bool); -int vfs_mkdir(struct user_namespace *, struct inode *, +int vfs_mkdir(struct mnt_idmap *, struct inode *, struct dentry *, umode_t); -int vfs_mknod(struct user_namespace *, struct inode *, struct dentry *, +int vfs_mknod(struct mnt_idmap *, struct inode *, struct dentry *, umode_t, dev_t); -int vfs_symlink(struct user_namespace *, struct inode *, +int vfs_symlink(struct mnt_idmap *, struct inode *, struct dentry *, const char *); -int vfs_link(struct dentry *, struct user_namespace *, struct inode *, +int vfs_link(struct dentry *, struct mnt_idmap *, struct inode *, struct dentry *, struct inode **); -int vfs_rmdir(struct user_namespace *, struct inode *, struct dentry *); -int vfs_unlink(struct user_namespace *, struct inode *, struct dentry *, +int vfs_rmdir(struct mnt_idmap *, struct inode *, struct dentry *); +int vfs_unlink(struct mnt_idmap *, struct inode *, struct dentry *, struct inode **); /** * struct renamedata - contains all information required for renaming - * @old_mnt_userns: old user namespace of the mount the inode was found from + * @old_mnt_idmap: idmap of the old mount the inode was found from * @old_dir: parent of source * @old_dentry: source - * @new_mnt_userns: new user namespace of the mount the inode was found from + * @new_mnt_idmap: idmap of the new mount the inode was found from * @new_dir: parent of destination * @new_dentry: destination * @delegated_inode: returns an inode needing a delegation break * @flags: rename flags */ struct renamedata { - struct user_namespace *old_mnt_userns; + struct mnt_idmap *old_mnt_idmap; struct inode *old_dir; struct dentry *old_dentry; - struct user_namespace *new_mnt_userns; + struct mnt_idmap *new_mnt_idmap; struct inode *new_dir; struct dentry *new_dentry; struct inode **delegated_inode; @@ -1646,14 +1646,14 @@ struct renamedata { int vfs_rename(struct renamedata *); -static inline int vfs_whiteout(struct user_namespace *mnt_userns, +static inline int vfs_whiteout(struct mnt_idmap *idmap, struct inode *dir, struct dentry *dentry) { - return vfs_mknod(mnt_userns, dir, dentry, S_IFCHR | WHITEOUT_MODE, + return vfs_mknod(idmap, dir, dentry, S_IFCHR | WHITEOUT_MODE, WHITEOUT_DEV); } -struct file *vfs_tmpfile_open(struct user_namespace *mnt_userns, +struct file *vfs_tmpfile_open(struct mnt_idmap *idmap, const struct path *parentpath, umode_t mode, int open_flag, const struct cred *cred); @@ -1677,10 +1677,10 @@ extern long compat_ptr_ioctl(struct file *file, unsigned int cmd, /* * VFS file helper functions. */ -void inode_init_owner(struct user_namespace *mnt_userns, struct inode *inode, +void inode_init_owner(struct mnt_idmap *idmap, struct inode *inode, const struct inode *dir, umode_t mode); extern bool may_open_dev(const struct path *path); -umode_t mode_strip_sgid(struct user_namespace *mnt_userns, +umode_t mode_strip_sgid(struct mnt_idmap *idmap, const struct inode *dir, umode_t mode); /* @@ -1798,27 +1798,26 @@ struct file_operations { struct inode_operations { struct dentry * (*lookup) (struct inode *,struct dentry *, unsigned int); const char * (*get_link) (struct dentry *, struct inode *, struct delayed_call *); - int (*permission) (struct user_namespace *, struct inode *, int); + int (*permission) (struct mnt_idmap *, struct inode *, int); struct posix_acl * (*get_inode_acl)(struct inode *, int, bool); int (*readlink) (struct dentry *, char __user *,int); - int (*create) (struct user_namespace *, struct inode *,struct dentry *, + int (*create) (struct mnt_idmap *, struct inode *,struct dentry *, umode_t, bool); int (*link) (struct dentry *,struct inode *,struct dentry *); int (*unlink) (struct inode *,struct dentry *); - int (*symlink) (struct user_namespace *, struct inode *,struct dentry *, + int (*symlink) (struct mnt_idmap *, struct inode *,struct dentry *, const char *); - int (*mkdir) (struct user_namespace *, struct inode *,struct dentry *, + int (*mkdir) (struct mnt_idmap *, struct inode *,struct dentry *, umode_t); int (*rmdir) (struct inode *,struct dentry *); - int (*mknod) (struct user_namespace *, struct inode *,struct dentry *, + int (*mknod) (struct mnt_idmap *, struct inode *,struct dentry *, umode_t,dev_t); - int (*rename) (struct user_namespace *, struct inode *, struct dentry *, + int (*rename) (struct mnt_idmap *, struct inode *, struct dentry *, struct inode *, struct dentry *, unsigned int); - int (*setattr) (struct user_namespace *, struct dentry *, - struct iattr *); - int (*getattr) (struct user_namespace *, const struct path *, + int (*setattr) (struct mnt_idmap *, struct dentry *, struct iattr *); + int (*getattr) (struct mnt_idmap *, const struct path *, struct kstat *, u32, unsigned int); ssize_t (*listxattr) (struct dentry *, char *, size_t); int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start, @@ -1827,13 +1826,13 @@ struct inode_operations { int (*atomic_open)(struct inode *, struct dentry *, struct file *, unsigned open_flag, umode_t create_mode); - int (*tmpfile) (struct user_namespace *, struct inode *, + int (*tmpfile) (struct mnt_idmap *, struct inode *, struct file *, umode_t); - struct posix_acl *(*get_acl)(struct user_namespace *, struct dentry *, + struct posix_acl *(*get_acl)(struct mnt_idmap *, struct dentry *, int); - int (*set_acl)(struct user_namespace *, struct dentry *, + int (*set_acl)(struct mnt_idmap *, struct dentry *, struct posix_acl *, int); - int (*fileattr_set)(struct user_namespace *mnt_userns, + int (*fileattr_set)(struct mnt_idmap *idmap, struct dentry *dentry, struct fileattr *fa); int (*fileattr_get)(struct dentry *dentry, struct fileattr *fa); } ____cacheline_aligned; @@ -1987,11 +1986,11 @@ static inline bool sb_rdonly(const struct super_block *sb) { return sb->s_flags #define IS_WHITEOUT(inode) (S_ISCHR(inode->i_mode) && \ (inode)->i_rdev == WHITEOUT_DEV) -static inline bool HAS_UNMAPPED_ID(struct user_namespace *mnt_userns, +static inline bool HAS_UNMAPPED_ID(struct mnt_idmap *idmap, struct inode *inode) { - return !vfsuid_valid(i_uid_into_vfsuid(mnt_userns, inode)) || - !vfsgid_valid(i_gid_into_vfsgid(mnt_userns, inode)); + return !vfsuid_valid(i_uid_into_vfsuid(idmap, inode)) || + !vfsgid_valid(i_gid_into_vfsgid(idmap, inode)); } static inline void init_sync_kiocb(struct kiocb *kiocb, struct file *filp) @@ -2296,11 +2295,6 @@ struct filename { }; static_assert(offsetof(struct filename, iname) % sizeof(long) == 0); -static inline struct user_namespace *file_mnt_user_ns(struct file *file) -{ - return mnt_user_ns(file->f_path.mnt); -} - static inline struct mnt_idmap *file_mnt_idmap(struct file *file) { return mnt_idmap(file->f_path.mnt); @@ -2320,7 +2314,7 @@ static inline bool is_idmapped_mnt(const struct vfsmount *mnt) } extern long vfs_truncate(const struct path *, loff_t); -int do_truncate(struct user_namespace *, struct dentry *, loff_t start, +int do_truncate(struct mnt_idmap *, struct dentry *, loff_t start, unsigned int time_attrs, struct file *filp); extern int vfs_fallocate(struct file *file, int mode, loff_t offset, loff_t len); @@ -2475,21 +2469,21 @@ static inline int bmap(struct inode *inode, sector_t *block) } #endif -int notify_change(struct user_namespace *, struct dentry *, +int notify_change(struct mnt_idmap *, struct dentry *, struct iattr *, struct inode **); -int inode_permission(struct user_namespace *, struct inode *, int); -int generic_permission(struct user_namespace *, struct inode *, int); +int inode_permission(struct mnt_idmap *, struct inode *, int); +int generic_permission(struct mnt_idmap *, struct inode *, int); static inline int file_permission(struct file *file, int mask) { - return inode_permission(file_mnt_user_ns(file), + return inode_permission(file_mnt_idmap(file), file_inode(file), mask); } static inline int path_permission(const struct path *path, int mask) { - return inode_permission(mnt_user_ns(path->mnt), + return inode_permission(mnt_idmap(path->mnt), d_inode(path->dentry), mask); } -int __check_sticky(struct user_namespace *mnt_userns, struct inode *dir, +int __check_sticky(struct mnt_idmap *idmap, struct inode *dir, struct inode *inode); static inline bool execute_ok(struct inode *inode) @@ -2677,7 +2671,7 @@ extern void __destroy_inode(struct inode *); extern struct inode *new_inode_pseudo(struct super_block *sb); extern struct inode *new_inode(struct super_block *sb); extern void free_inode_nonrcu(struct inode *inode); -extern int setattr_should_drop_suidgid(struct user_namespace *, struct inode *); +extern int setattr_should_drop_suidgid(struct mnt_idmap *, struct inode *); extern int file_remove_privs(struct file *); /* @@ -2836,7 +2830,7 @@ extern void page_put_link(void *); extern int page_symlink(struct inode *inode, const char *symname, int len); extern const struct inode_operations page_symlink_inode_operations; extern void kfree_link(void *); -void generic_fillattr(struct user_namespace *, struct inode *, struct kstat *); +void generic_fillattr(struct mnt_idmap *, struct inode *, struct kstat *); void generic_fill_statx_attr(struct inode *inode, struct kstat *stat); extern int vfs_getattr_nosec(const struct path *, struct kstat *, u32, unsigned int); extern int vfs_getattr(const struct path *, struct kstat *, u32, unsigned int); @@ -2887,9 +2881,9 @@ extern int dcache_dir_open(struct inode *, struct file *); extern int dcache_dir_close(struct inode *, struct file *); extern loff_t dcache_dir_lseek(struct file *, loff_t, int); extern int dcache_readdir(struct file *, struct dir_context *); -extern int simple_setattr(struct user_namespace *, struct dentry *, +extern int simple_setattr(struct mnt_idmap *, struct dentry *, struct iattr *); -extern int simple_getattr(struct user_namespace *, const struct path *, +extern int simple_getattr(struct mnt_idmap *, const struct path *, struct kstat *, u32, unsigned int); extern int simple_statfs(struct dentry *, struct kstatfs *); extern int simple_open(struct inode *inode, struct file *file); @@ -2898,7 +2892,7 @@ extern int simple_unlink(struct inode *, struct dentry *); extern int simple_rmdir(struct inode *, struct dentry *); extern int simple_rename_exchange(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry); -extern int simple_rename(struct user_namespace *, struct inode *, +extern int simple_rename(struct mnt_idmap *, struct inode *, struct dentry *, struct inode *, struct dentry *, unsigned int); extern void simple_recursive_removal(struct dentry *, @@ -2940,11 +2934,11 @@ extern int generic_check_addressable(unsigned, u64); extern void generic_set_encrypted_ci_d_ops(struct dentry *dentry); -int may_setattr(struct user_namespace *mnt_userns, struct inode *inode, +int may_setattr(struct mnt_idmap *idmap, struct inode *inode, unsigned int ia_valid); -int setattr_prepare(struct user_namespace *, struct dentry *, struct iattr *); +int setattr_prepare(struct mnt_idmap *, struct dentry *, struct iattr *); extern int inode_newsize_ok(const struct inode *, loff_t offset); -void setattr_copy(struct user_namespace *, struct inode *inode, +void setattr_copy(struct mnt_idmap *, struct inode *inode, const struct iattr *attr); extern int file_update_time(struct file *file); @@ -3111,13 +3105,13 @@ static inline bool is_sxid(umode_t mode) return mode & (S_ISUID | S_ISGID); } -static inline int check_sticky(struct user_namespace *mnt_userns, +static inline int check_sticky(struct mnt_idmap *idmap, struct inode *dir, struct inode *inode) { if (!(dir->i_mode & S_ISVTX)) return 0; - return __check_sticky(mnt_userns, dir, inode); + return __check_sticky(idmap, dir, inode); } static inline void inode_has_no_xattr(struct inode *inode) |